Union 8″ 3-Jaw Lathe Chuck 2-1/8″-8 2-1/8 8TPI Mount 153-K 2.15 Center Hole. I believe this to be 2-1/8″-8 as I measured the bore at 1.9850″ and the 8TPI with a thread gauge.
Union 8 3-Jaw Lathe Chuck 2-1/8-8 2-1/8 8TPI Mount 153-K 2.15 Center Hole
Union 8″ 3-Jaw Lathe Chuck 2-1/8″-8 2-1/8 8TPI Mount 153-K 2.15 Center Hole. I believe this to be 2-1/8″-8 as I measured the bore at 1.9850″ and the 8TPI with a thread gauge.